Sioux Falls: Daniil Ostapenkov vs Quinn Vandecasteele

This market refers to the tennis match between Daniil Ostapenkov and Quinn Vandecasteele in the Sioux Falls, USA, Qualifying, originally scheduled for October 25, 2026 at 12:10PM ET. This market will resolve to 'Daniil Ostapenkov' if Daniil Ostapenkov advances against Quinn Vandecasteele. This market will resolve to 'Quinn Vandecasteele' if Quinn Vandecasteele advances against Daniil Ostapenkov. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 8, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.